feat(helm): initial try at making a helm chart

hack/helm/Chart.yaml

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+---
+apiVersion: v2
+name: hnc
+description: A Helm chart to install hnc on Kubernetes
+
+# A chart can be either an 'application' or a 'library' chart.
+#
+# Application charts are a collection of templates that can be packaged into versioned archives
+# to be deployed.
+#
+# Library charts provide useful utilities or functions for the chart developer. They're included as
+# a dependency of application charts to inject those utilities and functions into the rendering
+# pipeline. Library charts do not define any templates and therefore cannot be deployed.
+type: application
+
+# This is the chart version. This version number should be incremented each time you make changes
+# to the chart and its templates, including the app version.
+# Versions are expected to follow Semantic Versioning (https://semver.org/)
+version: 0.1.0
+
+# This is the version number of the application being deployed. This version number should be
+# incremented each time you make changes to the application. Versions are not expected to
+# follow Semantic Versioning. They should reflect the version the application is using.
+appVersion: 0.8.0

hack/helm/templates/_helpers.tpl

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+{{/*
+File gernated by the `helm create` command
+*/}}
+
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "hnc.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Create a default fully qualified app name.
+We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+If release name contains chart name it will be used as a full name.
+*/}}
+{{- define "hnc.fullname" -}}
+{{- if .Values.fullnameOverride }}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- $name := default .Chart.Name .Values.nameOverride }}
+{{- if contains $name .Release.Name }}
+{{- .Release.Name | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
+{{- end }}
+{{- end }}
+{{- end }}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "hnc.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "hnc.labels" -}}
+helm.sh/chart: {{ include "hnc.chart" . }}
+{{ include "hnc.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "hnc.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "hnc.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "hnc.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create }}
+{{- default (include "hnc.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}

hack/helm/templates/clusterrole.yaml

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+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: {{ include "hnc.fullname" . }}
+  labels:
+    {{- include "hnc.labels" . | nindent 4 }}
+  annotations:
+    helm.sh/hook: pre-install,post-delete
+rules:
+- apiGroups:
+  - '*'
+  resources:
+  - '*'
+  verbs:
+  - '*'
+- nonResourceURLs:
+  - '*'
+  verbs:
+  - '*'

hack/helm/templates/clusterrolebinding.yaml

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+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: {{ include "hnc.fullname" . }}
+  labels:
+    {{- include "hnc.labels" . | nindent 4 }}
+  annotations:
+    helm.sh/hook: pre-install,post-delete
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: {{ include "hnc.fullname" . }}
+subjects:
+- kind: ServiceAccount
+  name: {{ include "hnc.fullname" . }}
+  namespace: {{ .Release.Namespace }}

hack/helm/templates/hnc-installation-jobs.yaml

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+---
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: {{ include "hnc.fullname" . }}
+  namespace: {{ .Release.Namespace }}
+  labels:
+    {{- include "hnc.labels" . | nindent 4 }}
+  annotations:
+    helm.sh/hook-weight: "1"
+    helm.sh/hook: pre-install
+spec:
+  template:
+    spec:
+      containers:
+      {{- range .Values.hncExcludeNamespaces }}
+      - name: labeler-{{ . }}
+        image: gcr.io/google_containers/hyperkube:v1.9.7
+        command:
+        - kubectl
+        - label
+        - ns
+        - {{ . }}
+        - hnc.x-k8s.io/excluded-namespace=true
+        - --overwrite
+      {{- end }}
+      restartPolicy: Never
+      serviceAccountName: {{ include "hnc.fullname" . }}
+---
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: hnc
+  namespace: {{ .Release.Namespace }}
+  labels:
+    {{- include "hnc.labels" . | nindent 4 }}
+  annotations:
+    helm.sh/hook-weight: "1"
+    helm.sh/hook: post-delete
+spec:
+  template:
+    spec:
+      containers:
+      {{- range .Values.hncExcludeNamespaces }}
+      - name: labeler-{{ . }}
+        image: gcr.io/google_containers/hyperkube:v1.9.7
+        command:
+        - kubectl
+        - label
+        - ns
+        - {{ . }}
+        - hnc.x-k8s.io/excluded-namespace-
+      {{- end }}
+      restartPolicy: Never
+      serviceAccountName: {{ include "hnc.fullname" . }}